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staging: olpc_dcon: Use backlight helper

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Instead of retrieving the backlight brightness in struct
backlight_properties manually, and then checking whether the backlight
should be on at all, use backlight_get_brightness() which does all
this and insulates this from future changes.

Cc: Jens Frederich <jfrederich@gmail.com>
Cc: Jon Nettleton <jon.nettleton@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-staging@lists.linux.dev
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20220607190049.1132154-1-steve@sk2.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Kitt 2022-06-07 21:00:49 +02:00 committed by Greg Kroah-Hartman
parent 18697b4793
commit 72aef4f60f
1 changed files with 1 additions and 4 deletions
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5
drivers/staging/olpc_dcon/olpc_dcon.c
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@ -517,10 +517,7 @@ static struct device_attribute dcon_device_files[] = {
static int dcon_bl_update(struct backlight_device *dev)
{
struct dcon_priv *dcon = bl_get_data(dev);
u8 level = dev->props.brightness & 0x0F;
if (dev->props.power != FB_BLANK_UNBLANK)
level = 0;
u8 level = backlight_get_brightness(dev) & 0x0F;
if (level != dcon->bl_val)
dcon_set_backlight(dcon, level);